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2008 | 30 | 2 |
Tytuł artykułu

Response of cytokinin pool and cytokinin oxidase/dehydrogenase activity to abscisic acid exhibits organ specificity in peas

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Changes in cytokinin pool and cytokinin oxidase/dehydrogenase activity (CKX EC: 1.5.99.12) in response to increasing abscisic acid (ABA) concentrations (0.5–10 μM) were assessed in the last fully expanded leaves and secondary roots of two pea (Pisum sativum) varieties with different vegetation periods. Certain organ diversity in CKX response to exogenous ABA was observed. Treatment provoked altered cytokinin pool in the aboveground parts of both studied cultivars. Specific CKX activity was influenced significantly basically in roots of the treated plants. Results suggest that ABA-mediated cytokinin pool changes are leaf-specific and involve certain root signals in which CKX activity presents an important link. This enzymatic activity most probably regulates vascular transport of active cytokinins from roots to shoots.
Słowa kluczowe
Wydawca
-
Rocznik
Tom
30
Numer
2
Opis fizyczny
p.151-155,fig.,ref.
Twórcy
autor
  • Acad. M. Popov Institute of Plant Physiology, Bulgarian Academy of Sciences, Acad, G. Bonchev Street, Block 21, 1113 Sofia, Bulgaria
autor
  • Acad. M. Popov Institute of Plant Physiology, Bulgarian Academy of Sciences, Acad, G. Bonchev Street, Block 21, 1113 Sofia, Bulgaria
autor
  • Institute of Experimental Botany CAS, Rozvojova 135, 165 02 Prague 6, Lysolaje, Czech Republic
  • Institute of Experimental Botany CAS, Rozvojova 135, 165 02 Prague 6, Lysolaje, Czech Republic
Bibliografia
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  • Christianson ML (2000) ABA prevents the second cytokinin-mediated event during the induction of shoot buds in the moss Funaria hygrometrica. Am J Bot 87(10):1540–1545
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  • Motyka W, Vaňková R, Čapková V, Petrášek J, Kaminek M, Shmülling T (2003) Cytokinin induced upregulation of cytokinin oxidase/dehydrogenase activity in tobacco includes changes in enzyme glycosylation and secretion. Physiol Plant 117:11–21
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  • Vaseva-Gemisheva I, Todorova D, Malbeck J, Travnickova A, Machackova I, Karanov E (2006) Cytokinin pool dynamic changes and distribution of cytokinin oxidase/dehydrogenase activity in peas in relation to developmental senescence. Comp Rend Bulg Acad Sci 59(1):65–70
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-27c6d61d-611f-41fa-9320-4d83575f66b3
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